Sand rammer



May 21, 1946 R. E. STEINMUELLER SAND HAMMER Filed July 23, 1945 INVENTOR.

RALPH as'rsmmususa BY WMKMA ATTORNEYS Patented May 21, 1946 UNITED STATES PATENT OFFICE Ralph E. Steinmueller, Detroit,

.. h-. a signor to Harry W. Dietert, Detroit, Mich. Application July 23, 1945, Serial No. 606,584

11 Claims.

The invention relates to ramming machines of that type more particularly designed for use in he rammin of st sp imens of m ld n terial and in which a predetermined impact is delivered by a alling weight.

It is the object of the invention to obtain a construction which can be manipulated with less fatigue to the operator and in which the force applied is accurately measured. To this end the invention consists in the construction-as hereinafter set forth.

In the drawing:

Fig. '1 is a perspective view of the machine;

Fig. 2 is a vertical cross section on line 22, Fig. 1;

Fig. 3 is a side elevation illustrating the manner of raising the ramming plunger for engaging the same with a mold containing'the material to be rammed;

Fig. 4 is a horizontal section on line l 4l, Fig.2.

causing the cam portion L to raise the cross head G, weight H, plunger E and ramming head F to provide clearance beneath the latter for insertion of the moldM in registration therewith. The parts are then lowered sufiiciently to rest the head F on the upper surface of, the

' sample M to be rammed after which the counter- The frame of the machine preferably comprises i an integral casting includinga base portion A, a column B rising therefrom and arms C and D extending laterally respectively from the upper end and the intermediate portion of said column. These arms have aligned bearings therein for slidably receiving a plunger rod E. The lower end of the rod E is provided with a ramming head F. A cross head G is secured to therod in a position to normally rest upon the arm D and the rear end of this cross head is bifurcated to embrace the column B. Surrounding the rod E and resting upon the cross head G is a weight H of predetermined mass. I is a crank handle pivotally mounted at J on one side of the cross head G and provided with a cam K for engaging the bottom of the weight to lift the same by a partial rotation of said crank handle. The cam is abruptly cut away beyond its most eccentric portion so as to permit the weight to drop, delivering an impact to the cross head G and through the latter to the plunger rod E and ramming head F. It is, however, necessary to first lift these parts sufiiciently to engage the head F with the mold or container for the material to be rammed. For this purpose I have provided a bell crank lever L which has a pivot fulcrum L near the outer end of the arm D. The lever L has a handle portion L extending vertically upward and a laterally extending portion L beneath the cross head G which forms a cam for raising said cross head when the handle is drawn outward. There is also preferably a downwardly extending portion L beyond the cam portion L which has a counterweight L at its lower end resting upon the base A to hold the lever in its normal Position. The arrangement is such that the operator may hold in one hand a mold, such as M containing the sample M to be. rammed, while with his other hand he can draw downward the handle portion L of the lever thereby weight L will return the lever to its normal position. The operator may then turn the crank handle I to lift the 'weight from the cross head and then to permit it to drop and deliver its impact. This operation may be repeated any desired number of times dependent upon the degree of compression to be imparted to the sample.

The lifting of the weight by the lever L in the manner just described can be accomplished with very little effort on the part of the operator and without any danger of prematurely dropping the weight before the sample is in place for ramming. Also, the counterweight L insures the automatic return of the lever to its normal position before the crank handle I and cam K are operated. If desired, a rubber bumper N may be placed on the base beneath the counterweight L to form 'a cushion therefor.

What I claim as my invention is:

1. lhe combination with a frame having a base and a column rising therefrom, of a rammer in-- cluding a rod vertically slidably mounted on said column, a cross head on said rod, a weight slidable on said rod and normally resting on said cross head, a cam mounted on said cross head for raising and dropping said weight to deliver an impact to said ranrmer, and a lever fulcrumed on said frame engageable with said cross head to lift the same together with said weight and rod to provide clearance on said base beneath said rammer for the insertion of the work.

2. The combination with a frame having a base and a. column rising therefrom, of a rammer including a rod vertically slidably mounted on said column, a cross head on said rod, a weight slidable on said rod and normally resting on said cross head, a cam mounted on said cross head for raising and dropping said weight to deliver 7 an impact to said rammer, and a lever fulcrumed on said frame having a vertically upwardly extending handle portion and a laterally extending arm engaging said cross head, said handle portion being adapted for actuation by one hand of the operator to lift said cross head together with said weight and rod thereby providing clearance on said base beneath said rammer for the insertion of the work by the other hand of the operator.

3'. Thecombination with a frame having a base, a. column rising therefrom and an arm extending laterally from said column over said base; of a rammer including arod vertically slidably engaging a bearing in said arm, a cross head on said rod normally resting on said arm, a Weight slidable on said rod normally resting on said cross head, a cam mounted on said cross head for raising and dropping said weight to deliver an impact to said rammer, a lever fulcrumed on said arm having a normally upright handle portion and a laterally extending portion beneath said cross head adapted to raise the latter together with said weight and rod so as to provide clearance on said base beneath said rammer for the insertion of the work, and a counterweight for returning and holding said lever in normal position in advance of the operation of said cam.

4. The combination with a frame having a base portion, a column rising therefrom, and a pair of arms extending laterally from said column respectively from the upper and intermediate portion thereof, a rammer including a rod extending vertically through aligned apertures in said arms to be freely slidable therein, a cross head secured to said rod normallyresting on the lower of said arms, a weight normally resting on said cross head and slidable on the portion of therod above the same, a cam mounted on said cross head for lifting and dropping said weight to deliver an impact to said rod, a lever fulcrumed on the outer end portion of said lower arm having a normally upright handle portion and a laterally extending portion beneath said cross head when resting on said arm, said handle portion being adapted to be grasped by one hand of the operator and drawn downward to lift said cross head together with said weight and rod so as to provide clearance on said base beneath said rammer for the insertion of the work by the other hand of the operator.

5. The combination with a frame having a base portion, a column rising therefrom, and a pair of arms extending laterally from said column respectively from the upper and intermediate portion thereof, a rammer including a rod extending vertically through aligned apertures in said arms to be freely slidable therein, a cross head secured to said rod normally resting on the lower of said arms, a weight normally resting on said cross head and slidable on the portion of the rod above the same, a cam mounted on said cross head for lifting and dropping said weight to deliver an impact to said rod, and a lever fulcrumed on the outer end portion of said lower arm having a normally upright handle portion, a portion extending beneath said cross head when resting on said arm and a counterweight portion extending downward from the latter portion and normally adapted for actuation by one hand of the operator to lift said cross head together with said weight and rod so as to provide clearance on said base beneath said rammer for the insertion of the work by the other hand of the operator, said counterweight portion returning said lever to normal position in advance of the operation of said cam.

6. The combination with a frame having a base and a column rising therefrom, of a rammer including a rod vertically slidably mounted on said column, a cross head on said rod, 3, weight slidable on said rod and normally resting on said cross head, means mounted on said cross head for raising and dropping said weight to deliver an impact to said rammer, and means engageable with said cross head to lift the same together with said weight and rod to provide clearance on said base beneath'said rammer for the insertion of the work.

7. The combination with a frame having a, base and a column rising therefrom, of a rammer ineluding a rod vertically slidably mounted on said column, a cross head on said rod, a weight slidable on said rod and normally resting on said cross head, a cam mounted on said cross head for raising and dropping said weight to deliver an impact to said rammer, and means engageable with said cross head to lift the same together with said weight and rod to provide clearance on said base beneath said rammer for the insertion of the work.

8. The combination with a, frame having a base and a column rising therefrom, of a rammer including a rod vertically slidably mounted on said column, a cross head on said rod, a weight slidable on said rod and normally resting on said cross head, means mounted on said cross head for raising and dropping said weight to deliver an impact to said rammer, and a lever fulcrumed on said frame engageable with said cross head to lift the same together with said weight and rod to provide clearance on said-base beneath said rammer for the insertion of the Work.

9. The combination with a frame having a base and a column rising therefrom, of a rammer including a rod vertically slidably mounted on said column, a cross head on said rod, a weight slidable on said rod and normally resting on said cross head, means for raising and dropping said weight to deliver an impact to said rammer, and a lever fulcrumed on said frame having a handle portion and a laterally extending arm engaging said cross head, said handle portion being adapted for actuation by one hand of the operator to cause said laterally extending arm to lift said cross head together with said weight and rod to provide clearance on said base beneath said rammer for the insertion of the work by the other hand of the operator.

10. The combination with a frame having a base, a column rising from said base and arms projecting laterally from said column at vertically spaced points thereof, of a rammer including a rod vertically slidably mounted in said arms, the lower end of said rod having a ramming head, a cross head secured to said rod in a position to normally rest upon one of said arms, said cross head being bifurcated to embrace said column, a weight slidable On said rod and normally resting on said cross head, a, crank pivotally mounted on said cross head and having a cam for raising and dropping said weight to deliver an impact to said rammer, and a lever pivotally mounted on one of said arms and having a cam portion engageable with said cross head to lift the same together with said weight and rod to provide clearance on said base beneath said ramming head for the insertion of work to be rammed.

11. The combination with a frame having a base, a column rising from said base and arms projecting laterally from said column at vertically spaced points thereof, of a rammer including a rod verticallyslidably mounted in said arms, a cross head secured to said rod in a position to normally rest upon one of said arms, a weight slidable on said rod and normally resting on said cross head, a crank pivotally mounted on said cross head and having a cam for raising and dropping said weight to deliver an impact to said rammer, and a lever pivotally mounted on one of said arms and having a portion engageable with said cross head to lift the same together with said weight'and rod to provide clearance on said base beneath said rammer for the insertion of work to be rammed.

RALPH E. STEINMUELLER. 

